SEATTLE -- SeaTac airport shut down all three of its runways at 5:30 a.m.Thursday in an effort to clear ice from a regional storm that's expected to drop freezing rain through noon.
One runway was reopened about 7 a.m. A second was reopened mid-morning, but only for departures.
KING 5 TV in Seattle reports that ice was also forming on planes and equipment that services those aircraft. An incoming flight from Hawaii destined for Seattle was diverted to Portland.
By 7 a.m., 15 flights at PDX had been canceled.
Forecasters expect temperatures to rise above freezing by afternoon. The ice storm warning covers Seattle, Tacoma, Bremerton, the east Puget Sound lowlands, lower Chehalis Valley and central coast, including Hoquiam.
Forecasters expect up to four-tenths of an inch of ice to make driving hazardous and to cause power outages.